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PostPosted: Mon Feb 12, 2018 5:05 pm 
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EFI Slant 6

Joined: Mon May 26, 2014 4:02 pm
Posts: 414
Location: Vermont
Car Model: Slant Six M37
It seems like a great way to have both economy and airflow. They were installed on 318s so it would seem a well built 225 might do as well with one as a holley 390...

I have no actual experience with ether, I am just putting thoughts together that do not belong in the same room..


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PostPosted: Mon Feb 12, 2018 5:45 pm 
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SL6 Racer & Moderator
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Joined: Sat Oct 19, 2002 12:06 pm
Posts: 8422
Location: Silver Springs, Fl.
Car Model:
I haven't tried it, but I have always thought a Spreadbore carb should work nice on a warmed slant with some tuning required, but I was thinking Q-jet.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 225 nitrous
64 Valiant Signet
64 Valiant 4dr 170


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PostPosted: Mon Feb 12, 2018 6:19 pm 
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Supercharged
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Joined: Sun Nov 03, 2002 9:20 pm
Posts: 13008
Location: Fircrest, WA
Car Model: 76 D100
Frank Raso used to advocate the Q-jet, and there was a member who managed to carefully saw a Thermoquad in half and run it as a spreadbore two barrel. Somewhere I have pictures of that.


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PostPosted: Mon Feb 12, 2018 6:20 pm 
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Board Sponsor
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Joined: Tue Oct 29, 2002 8:27 pm
Posts: 9760
Location: Salem, OR
Car Model:
You'd have to get a Q-jet or Holey 4360 to bat in the 400-500 cfm range... the standard mopar T-quads are big and anything but a
built slant would be able to use the 700+ cfm big block units...


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PostPosted: Mon Feb 12, 2018 7:32 pm 
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Turbo Slant 6

Joined: Fri Apr 16, 2004 10:50 am
Posts: 660
Location: Stevensville, ON
Car Model:
I'm happy with the Q-Jet on my car and I like it better than the AFB I had on it previously. I have it turned 90° like I had the AFB. It gets better fuel economy than the BBS too.

Quadrajet Upgrade

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1965 Plymouth Barracuda,
225 engine, Quadrajet, HEI, Dutra Duals, 904 Torqueflite, 2.76:1 axle, Addco front bar
Rods & Relics - Fort Erie, ON / Collector Car Tech


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PostPosted: Tue Feb 13, 2018 10:36 am 
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EFI Slant 6

Joined: Mon May 26, 2014 4:02 pm
Posts: 414
Location: Vermont
Car Model: Slant Six M37
FrankRaso wrote:
I'm happy with the Q-Jet on my car and I like it better than the AFB I had on it previously. I have it turned 90° like I had the AFB. It gets better fuel economy than the BBS too.

Quadrajet Upgrade


Ok, I will become a student of the Q-jet..

Frank, which side do you have the primary's on, away from or towards the engine?


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PostPosted: Wed Feb 14, 2018 10:06 am 
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Turbo Slant 6

Joined: Fri Apr 16, 2004 10:50 am
Posts: 660
Location: Stevensville, ON
Car Model:
Keep in mind that Quadrajet and Thermoquad carburetors are obsolete and tuning parts can sometimes be a challenge to acquire. Luckily for me, all I needed for tuning my Q-Jet was some primary jets.

I have my carb facing the driver-side fender. My reasoning for this this that the carburetor will operating for the vast majority of time with the secondaries closed and I wanted the primaries to be as equidistant as possible to all cylinders.

Write-ups here:
Quadrajet Conversion
Quadrajet Tuning

_________________
1965 Plymouth Barracuda,
225 engine, Quadrajet, HEI, Dutra Duals, 904 Torqueflite, 2.76:1 axle, Addco front bar
Rods & Relics - Fort Erie, ON / Collector Car Tech


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PostPosted: Wed Feb 14, 2018 12:04 pm 
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Supercharged
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Joined: Sun Nov 03, 2002 9:20 pm
Posts: 13008
Location: Fircrest, WA
Car Model: 76 D100
Found it!

TWO BARREL THERMO QUAD


Last edited by Reed on Wed Feb 14, 2018 12:14 pm, edited 2 times in total.

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PostPosted: Wed Feb 14, 2018 12:13 pm 
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EFI Slant 6

Joined: Mon May 26, 2014 4:02 pm
Posts: 414
Location: Vermont
Car Model: Slant Six M37
FrankRaso wrote:
Keep in mind that Quadrajet and Thermoquad carburetors are obsolete and tuning parts can sometimes be a challenge to acquire. Luckily for me, all I needed for tuning my Q-Jet was some primary jets.

I have my carb facing the driver-side fender. My reasoning for this this that the carburetor will operating for the vast majority of time with the secondaries closed and I wanted the primaries to be as equidistant as possible to all cylinders.

Write-ups here:
Quadrajet Conversion
Quadrajet Tuning



I overlooked the link you provided in your earlier post. Your write-up on tuning the quadra-jet is detailed and easy to follow. More than enough info here to get me in well over my head... Thank you!


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